Lock for stereotactic instrument



FIG. 1 is a perspective view of the top of a lock for stereotactic instrument showing my new design;

FIG. 2 is a perspective view of the bottom of the instrument of FIG. 1;

FIG. 3 is an exploded bottom perspective view of the instrument of FIG. 1; and,

FIG. 4 is an exploded top perspective view of the instrument of FIG. 1.

The surfaces or portions of the instrument not shown in the drawing or described in the specification form no part of the claimed design. 

The ornamental design for lock for stereotactic instrument, as shown and described. 